FILE - In this Wednesday, June 1, 2011 file photo, referee Ibrahim Chaibou, red top, is surrounded by Argentina soccer players after he awarded a penalty against them during an international friendly soccer match with Nigeria Super eagles at the National stadium in Abuja, Nigeria. Chaibou has refereed at five international games that a top betting monitor has flagged as suspicious, including this Nigeria-Argentina game. (AP Photo/Sunday Alamba, file)